How to Install Brake Controller Wiring on a 2008 Toyota Tundra SR5 Crewmax

Published 04/24/2009

Question:

If your 2008 Toyota Tundra has the factory 7-way connector in the back, then you should be able to plug in a brake controller adapter under the dash of the Tundra. Does the connector provided by the manufacturer look like the Universal Brake Control Wiring Adapter, part # 3040-S. If so, then you will just need to connect the wires coming out of the back of the Draw-Tite Activator, part # 5504, to the proper wires on your factory supplied harness, and plug in the adapter. The brake controller wire functions are: White: Ground wire. Black: 12v lead wire. Blue: Electric brake signal wire. Red: Stoplight switch, this wire would have a power reading when the brake pedal is pressed, but would have none when it is released. You can view some additional information on installing a brake controller at the links provided.

asked by: Brian

Expert Reply:

If your 2008 Toyota Tundra has the factory 7-way connector in the back, then you should be able to plug in a brake controller adapter under the dash of the Tundra. Does the connector provided by the manufacturer look like the Universal Brake Control Wiring Adapter, part # 3040-P. If so, then you will just need to connect the wires coming out of the back of the Draw-Tite Activator, part # 5504, to the proper wires on your factory supplied harness, and plug in the adapter.

The brake controller wire functions are:

White: Ground wire.
Black: 12v lead wire.
Blue: Electric brake signal wire.
Red: Stoplight switch, this wire would have a power reading when the brake pedal is pressed, but would have none when it is released.

With all of that said the 3040-P can be used in place of the factory provided harness, and will plug directly into your trailer brake controller and vehicle so no splicing is required.

You can view some additional information on installing a brake controller at the links provided.

expert reply by: Andi